LF909 Large
Lead Free* Reduced Pressure Zone Assembly Backflow Preventers with Flood Sensor - Large Diameter 2-1/2 - 10 IN Sizes
Series LF909 Large Lead Free* Reduced Pressure Zone assemblies feature a flood sensor using SentryPlus Alert® technology to detect continuous discharge from the relief valve. When paired with an add on connection kit, the sensor is activated to relay alerts for potential flooding events. Connection kit options include BMS, cellular communication, and the Sensor Control Monitor which enables integration with BAS via RS-485 Modbus or the Nexa® platform through Wi-Fi.
Prevents reverse flow of contaminated water caused by backsiphonage or backpressure. Ideal for health‑hazard cross‑connection protection or service line containment. Compact, modular design allows easy maintenance access; installation requirements should be verified with local water authorities.
To learn more visit: https://www.watts.ca/floodprotectionsystem
The valve’s internals are protected by ArmorTek®, a multilayer corrosion‑resistant coating engineered to extend service life in demanding environments.
To learn more visit: https://www.watts.ca/armortek
Features
- Sensor on the relief valve for flood detection
- Integrates with the Sensor Control Monitor to deliver maintenance alerts to BAS via RS-485 Modbus or the Nexa platform by Wi-Fi connectivity
- ArmorTek coating technology to resist corrosion of internals
- Exclusive relief valve design provides maximum capacity during emergency conditions
- Industrial strength sensing hose on larger size models
- Can be used in a variety of installations, including containment at the service line entrance
- No special tools required for servicing
Literature
Approval/Certification Information
For product-specific approval information, please refer to the product’s specification sheet (see literature section above) or ask a Watts representative. For general information regarding any approval certification partners identified in the specification sheet, please visit our certification partners’ websites:
| ASSE | CSA | FM Approvals | NSF |
| UL | ULC | USC | WQA |